FN Archimer Export Format
PT J
TI Molybdenum isotope signature of microbial nitrogen utilization in siboglinid tubeworms
BT 
AF Wang, Xudong
   Xu, Ting
   Peckmann, Jörn
   Bayon, Germain
   Jia, Zice
   Gong, Shanggui
   Li, Jie
   Cordes, Erik
   Sun, Yanan
   Tao, Jun
   Chen, Duofu
   Feng, Dong
AS 1:1,2;2:3;3:4;4:5;5:1;6:1;7:1;8:6;9:3;10:7;11:1;12:1,2;
FF 1:;2:;3:;4:PDG-REM-GEOOCEAN-ASTRE;5:;6:;7:;8:;9:;10:;11:;12:;
C1 Shanghai Engineering Research Center of Hadal Science and Technology, College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China
   Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China
   Department of Ocean Science, Division of Life Science, and Hong Kong Branch of the Southern Science and Engineering Guangdong Laboratory, The Hong Kong University of Science and Technology, Hong Kong, China
   Institute for Geology, Center for Earth System Research and Sustainability, Universität Hamburg, 20146 Hamburg, Germany
   Univ Brest, CNRS, Ifremer, Geo-Ocean, F-29280 Plouzané, France
   Department of Biology, Temple University, Philadelphia, Pennsylvania 19122, USA
   MLR Key Laboratory of Marine Mineral Resources, Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510070, China
C2 UNIV SHANGHAI OCEAN, CHINA
   QNLM, CHINA
   UNIV HONG KONG, CHINA
   UNIV HAMBURG, GERMANY
   IFREMER, FRANCE
   UNIV TEMPLE, USA
   CHINA GEOL SURVEY, CHINA
SI BREST
SE PDG-REM-GEOOCEAN-ASTRE
UM GEO-OCEAN
IN WOS Ifremer UMR
   copubli-europe
   copubli-int-hors-europe
   copubli-sud
IF 5.8
TC 0
UR https://archimer.ifremer.fr/doc/00840/95154/102860.pdf
LA English
DT Article
AB Many chemosynthesis-based communities prospering in deep-sea environments rely on the metabolic activity of sulfide-oxidizing bacteria. This is the case for vestimentiferan siboglinid tubeworms, whose demand for nutrition is satisfied predominantly by their endosymbiotic bacteria harbored in a specialized organ called the trophosome. Such chemosymbiosis leads to a significantly lower nitrogen isotope composition of the trophosome than in other types of soft tissue. However, the specific process of nitrogen utilization by siboglinids remains unclear. As a key element in the relevant enzymes (nitrogenase and nitrate reductase), molybdenum (Mo) is indispensable in the biogeochemical cycling of nitrogen. The Mo isotope composition (δ98Mo) of siboglinids is thus a potential proxy for decoding the processes involved in nitrogen metabolism. In this study, we found δ98Mo values along the chitinous tube of the vestimentiferan siboglinid Paraescarpia echinospica from the Haima seeps of the South China Sea as negative as −4.59‰ (−1.13‰ ± 1.75‰, 1SD, n = 19)—the lowest δ98Mo value ever reported for any kind of natural material. It is suggested that this extremely negative Mo isotope composition is caused by preferential utilization of isotopically light Mo by the tubeworm's endosymbionts or epibionts during nitrate reduction. Such Mo isotope signature could provide a means for identifying siboglinid tubeworms, a group of annelids that has previously escaped unambiguous identification due to the lack of mineralized skeleton, in the rock record. 
PY 2023
PD JUN
SO Geology
SN 0091-7613
PU Geological Society of America
VL 51
IS 7
UT 001007172500001
BP 698
EP 702
DI 10.1130/G51077.1
ID 95154
ER

EF